Core Spotlight & NSUserActivity Reference

Overview

Comprehensive guide to Core Spotlight framework and NSUserActivity for making app content discoverable in Spotlight search, enabling Siri predictions, and supporting Handoff. Core Spotlight directly indexes app content while NSUserActivity captures user engagement for prediction.

Key distinction Core Spotlight = indexing all app content; NSUserActivity = marking current user activity for prediction/handoff.

When to Use This Skill

Use this skill when:

• Indexing app content (documents, notes, orders, messages) for Spotlight
• Using NSUserActivity for Handoff or Siri predictions
• Choosing between CSSearchableItem, IndexedEntity, and NSUserActivity
• Implementing activity continuation from Spotlight results
• Batch indexing for performance
• Deleting indexed content